ath79: add support for TP-Link RE450 v3

TP-Link RE450 v3 is a dual band router/range-extender based on
Qualcomm/Atheros QCA9563 + QCA9880.

This device is nearly identical to RE450 v2 besides a modified flash
layout (hence I think force-flashing a RE450v2 image will lead to at
least loss of MAC address).

Specification:

- 775 MHz CPU
- 64 MB of RAM (DDR2)
- 8 MB of FLASH (SPI NOR)
- 3T3R 2.4 GHz
- 3T3R 5 GHz
- 1x 10/100/1000 Mbps Ethernet (AR8033 PHY)
- 7x LED, 4x button-
- possible UART header on PCB¹

Flash instruction:
Apply factory image in OEM firmware web-gui.

¹ Didn't check to connect as I didn't even manage to connect on
  RE450v2 (AFAIU it requires disconnecting some resistors, which I was
  too much of a coward to do).  But given the similarities to v2 I
  think it's the same or very similar procedure (and most likely also
  the only way to debrick).

Signed-off-by: Andreas Wiese <aw-openwrt@meterriblecrew.net>
[remove dts-v1 and compatible in DTSI]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 53 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/qca9563_tplink_re450-v3.dts b/target/linux/ath79/dts/qca9563_tplink_re450-v3.dts
new file mode 100644
index 0000000000..f85f02428b
--- /dev/null
+++ b/target/linux/ath79/dts/qca9563_tplink_re450-v3.dts
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "qca9563_tplink_re450.dtsi"
+
+/ {
+	compatible = "tplink,re450-v3", "qca,qca9563";
+	model = "TP-Link RE450 v3";
+};
+
+&partitions {
+	partition@0 {
+		label = "u-boot";
+		reg = <0x000000 0x020000>;
+		read-only;
+	};
+
+	info: partition@20000 {
+		label = "info";
+		reg = <0x020000 0x002000>;
+		read-only;
+	};
+
+	partition@22000 {
+		label = "partition-table";
+		reg = <0x022000 0x002000>;
+		read-only;
+	};
+
+	partition@24000 {
+		label = "info2";
+		reg = <0x024000 0x00a000>;
+		read-only;
+	};
+
+	partition@2e000 {
+		label = "config";
+		reg = <0x02e000 0x022000>;
+		read-only;
+	};
+
+	partition@50000 {
+		compatible = "tplink,firmware";
+		label = "firmware";
+		reg = <0x050000 0x7a0000>;
+	};
+
+	art: partition@7f0000 {
+		label = "art";
+		reg = <0x7f0000 0x010000>;
+		read-only;
+	};
+};